package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioConfiguration;
import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.common.result.Result;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.StringJoiner;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioConfiguration minioConfiguration;
    @Autowired
    private MinioProperties minioProperties;
    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
        //判断桶是否存在
        MinioClient minioClient = minioConfiguration.minioClient();

            boolean b = minioClient.bucketExists(BucketExistsArgs.builder()
                    .bucket(minioProperties.getBucketName()).build());
            if (!b){
                //桶不存在
                //创建桶
                minioClient.makeBucket(MakeBucketArgs.builder()
                        .bucket(minioProperties.getBucketName()).build());
                //给这个桶设置配置文件
                minioClient.setBucketPolicy(SetBucketPolicyArgs.builder()
                        .bucket(minioProperties.getBucketName())
                        .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                        .build());
            }
            //开始上传稿文件
            //putObject方法可以上传流文件
            String filename = filename(file);
            minioClient.putObject(PutObjectArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .contentType(file.getContentType())
                    .stream(file.getInputStream(),file.getSize(),-1)
                    .object(filename).build());
            return String.join("/", minioProperties.getEndpoint(), minioProperties.getBucketName(), filename);
    }

    private String filename(MultipartFile file){
        return new SimpleDateFormat("yyyyMMdd").format(new Date()) +"/"+ UUID.randomUUID()+"-"+file.getOriginalFilename();
    }
    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
